Here is a macro tip for Ceric Cabalists who wants to have better control of whether Obliterate is really ENABLED or DISABLED on all characters, not just Toggled to some potentially unknown state:

Macro to ENABLE: cast [notactive] Obliterate
Macro to DISABLE: cancelbuff Obliterate

This works for other Toggle abilities too. I have several buffs where I use the ENABLE macro on my various characters and classes, so I can just spam the BUFF buttons to turn everything on.